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Waterbear, you were exactly correct on your estimate. I had to do 5 more partial drains to bring the CYA level down to 40. The water has been so clear since I got the stabilizer level down and stayed on top of the chlorine level that I have actually been enjoying the pool rather than swearing at...

Thanks for the safety warning. Seeing as how I'm in Florida, where you can't have a basement because of ground water levels, I should probably not flirt with disaster by emptying the pool. I will do as suggested and drain from the bottom drain and fill in the shallow end. Thanks again.

Hmmm. If the CYA is above 100 after draining half the pool and refilling, why would I want to repeat the process? Assuming the best case scenario of it being 101 (not likely) I would theoretically be close to the normal range after draining half and refilling one more time. But if the level is...

Thanks for your input, waterbear. This makes me doubt every reagent in the kit. At least I hope it's only the reagents. After draining & refilling roughly half of the pool's volume, my CYA is still >100.

waste, you are probably right on the CYA level. Refilling is at least half way done and CYA level is still >100. Maybe I'll get lucky and a hurricane will wash the stabilizer away. :wink: jjdurant, I will consider the Leslie's kit as a emergency back-up and order the TF100. Thanks to both of you.

Thanks for your responses so far. It had seemed to me that the chlorine was more effective if the pH was within the normal range, but then again what do I know, I was busy poisoning my water with pucks for 7 years. I also could not see the logic in the free chlorine being less than the total...

I have had problems keeping pool algae-free for last couple of years, luckily I stumbled upon this site. I went to a local Leslie's to get the FAS-DPD kit but they didn't have it. I purchased a "Total Poolcare DPD Test Kit". The results were as follows: pH 7.5 FC 2 TC 1 TA 130 CYA >100 CH not...